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EGSO broker. Luigi Ciminiera ( [email protected] ) Claudio Zunino ( [email protected] ) Andrea Sanna ( [email protected] ) Irene Pompili ( [email protected] ). VSInc Joint Technical Meeting. Outline. Broker architecture Release 1 Release 2 Query Management

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egso broker

EGSO broker

Luigi Ciminiera ( [email protected] )

Claudio Zunino ( [email protected] )

Andrea Sanna ( [email protected] )

Irene Pompili ( [email protected] )

VSInc Joint Technical Meeting

outline
Outline
  • Broker architecture
  • Release 1
  • Release 2
  • Query Management
  • Future work
broker architecture
Broker architecture
  • Three main subsystems
    • Information retrieval
    • External Interaction
    • Metadata Management
release 1 implementation
Release 1 implementation
  • Queries managed are parameters based (time, wavelength intervals or instruments)
  • The Broker uses a first version Search Registry to select Providers can satisfy the query received from the Consumer and forward it to them
  • Then the Broker collect results received from Providers and sends back them to the Consumer
  • The Search Registry is a metadata catalogue obtained summarizing the data of the providers (for example time granularity = 1 day)
release 1 query

Consumer

Provider 1

Provider 3

Provider 2

Search registry

Release 1 query

Broker

query

results

release 2 implementation
Release 2 implementation
  • Queries managed are event based ( flares )
  • The Broker uses the Solar Event Catalogue (SEC) Server to obtain information about events that satisfy a set of parameters specified in the Consumer query.
  • The Broker receives results from the SEC server and uses them to search in the Search Registry according to other parameters listed in the query to find a list of instruments that were observing that events.
  • The results of this search is sent back to the Consumer. The Consumer will use this result to obtain data from Providers.
release 2 query

Consumer

SEC Server

Search registry

Release 2 query

Broker

Only events that satisfy the second part of the query parameters

All events that satisfy the first part of the query parameters

query

results

future work
Future work
  • Merge Release 1 and Release 2 capabilities
  • Multiple brokers
    • Fault tolerance
    • Performance enhancement
    • Distributed Search Registry
  • Caching capabilities
  • Security mechanisms
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